﻿// The Nova Project by Ken Beckett.
// Copyright (C) 2007-2012 Inevitable Software, all rights reserved.
// Released under the Common Development and Distribution License, CDDL-1.0: http://opensource.org/licenses/cddl1.php

using System.Collections.Generic;
using System.Windows.Media;

using Nova.CodeDOM;

namespace Nova.UI
{
    /// <summary>
    /// The view model for a <see cref="CodeDOM.ForEach"/>.
    /// </summary>
    public class ForEachVM : BlockStatementVM
    {
        #region /* STATICS */

        internal static void AddViewModelMapping()
        {
            CreateViewModel.Add(typeof(ForEach),
                delegate(CodeObject codeObject, bool isDescription, Dictionary<CodeObject, CodeObjectVM> dictionary) { return new ForEachVM((ForEach)codeObject, isDescription, dictionary); });
        }

        #endregion

        #region /* FIELDS */

        protected LocalDeclVM _iterationVM;
        protected ExpressionVM _collectionVM;

        #endregion

        #region /* CONSTRUCTORS */

        /// <summary>
        /// Create a view model instance for the specified <see cref="CodeDOM.ForEach"/>.
        /// </summary>
        public ForEachVM(ForEach forEach, bool isDescription, Dictionary<CodeObject, CodeObjectVM> dictionary)
            : base(forEach, isDescription, dictionary)
        {
            _iterationVM = (LocalDeclVM)CreateVM(forEach.Iteration, isDescription, dictionary);
            _collectionVM = (ExpressionVM)CreateVM(forEach.Collection, isDescription, dictionary);
        }

        #endregion

        #region /* PROPERTIES */

        /// <summary>
        /// The underlying <see cref="CodeDOM.ForEach"/> model.
        /// </summary>
        public ForEach ForEach
        {
            get { return (ForEach)CodeObject; }
        }

        /// <summary>
        /// The <see cref="LocalDeclVM"/> iteration variable.
        /// </summary>
        public LocalDeclVM IterationVM
        {
            get { return _iterationVM; }
        }

        /// <summary>
        /// The collection being iterated over.
        /// </summary>
        public ExpressionVM CollectionVM
        {
            get { return _collectionVM; }
        }

        #endregion

        #region /* METHODS */

        #endregion

        #region /* RENDERING */

        public override Brush BorderBrush
        {
            get { return DarkLavender; }
        }

        public override Brush BackgroundBrush
        {
            get { return Brushes.Lavender; }
        }

        protected override void RenderArgument(CodeRenderer renderer, RenderFlags flags)
        {
            if (_iterationVM != null)
                _iterationVM.Render(renderer, flags | RenderFlags.IsPrefix);
            renderer.RenderText(ForEach.ParseTokenIn, KEYWORD_BRUSH, this);
            _collectionVM.Render(renderer, flags | RenderFlags.PrefixSpace);
        }

        public override void RenderVisible(CodeRenderer renderer, RenderFlags flags)
        {
            base.RenderVisible(renderer, flags);
            _collectionVM.RenderVisible(renderer, flags);
        }

        public override void UnRender()
        {
            if (_iterationVM != null)
                _iterationVM.UnRender();
            _collectionVM.UnRender();
            base.UnRender();
        }

        #endregion
    }
}
